The truck crashed into a tree on campus and police took a man into custody, university officials said. No students were involved or harmed.

“There is no threat to the community and we've encouraged people to go about their normal activity,” university spokeswoman Annette Hacker said.

Ames police attempted a traffic stop on a pickup about 10:30 a.m. and a chase ended on the ISU campus, university police said on their Facebook page. The pickup driver rammed police cars and an Ames police officer fired at the truck, which crashed into a tree. The pickup driver is hospitalized.

Police cordoned off an area around where the crash site and asked people to avoid that area.

Students and university employees were told by the campus notification system that shots had been reported fired on campus. The message is distributed by email, cellphone and text message.

The Iowa State Daily, the university's student newspaper, said an alert was sent to ISU students at 10:55 a.m., saying the threat was over.

Warren Madden, the university's senior vice president, told the newspaper that police said the pickup truck involved was stolen.

The truck had a Spring Green Lawn Care logo on the side. A woman who answered the telephone at the business’ Boone office said the company had no comment.